Sierra & Speer manual, data needed

Discussion in 'Reloading' started by loaders_loft, Nov 17, 2009.

  1. loaders_loft

    loaders_loft Well-Known Member

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    If you have a Sierra and/or Speer Manual, could someone please lookup the .260 rem and tell me the test barrel length, and what is the highest velocity on max loads for 142gr SMK and 140gr Hotcor bullets?

    What does Sierra recommend as the "accuracy" load?

    Nosler shows a 24" 1:9 with N560 at 2830fps
    Hornady shows a 24" 1:8 with all powders at 2700fps
    Barnes shows a 24" 1:9 with no 140 class bullets:cool:
    Strangely, the lapua/vihtavouri data lists a 18.75" 1:9 with N560 at 2586fps.
    Hodgdon's site (no barrel data) 140 partitions & IMR7828 at 2755fps, 142 smk & H4831 at 2747fps

    Bottom line, I've got a 26" #10mtu fluted barrel and 139 scenars on order, debating on dropping down to 24" to trim muzzle weight. Sitting in an A3-5 adjustable, I'm concerned about being muzzle heavy. I'll have to chat with the gunsmith tomorrow a.m...
     
  2. Chas1

    Chas1 Well-Known Member

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    LOADERS_LOFT, Sierra 142gr SMK, 24" 1 in 8 twist, max 2700 fps from loads as follows: Viht N540=39.2 next H380=41.5 next H414=42.5 next Viht N150=39.9 next Viht N550=41.0 next RE-19=44.5 Hope this helps
     
    Last edited: Nov 17, 2009

  3. loaders_loft

    loaders_loft Well-Known Member

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    thanks! Anyone with a speer manual, please chime in!
     
  4. Chas1

    Chas1 Well-Known Member

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    LOADER_LOFT, a little late here on the east coast but I'll check with a buddy of mine in the morning I think he may have a Speer manual.
     
    Last edited: Nov 17, 2009
  5. steve99

    steve99 Member

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    Speer manual #14 .260 Rem test barrel is 24" Remington 700 No twist rate given.

    Highest velocity with a 140gn Spitzer SP

    45.5gns RE 19...........2731fps
    44.0gns IMR 4831.....2722fps
    46.0gns RE22............2701fps
     
  6. Chas1

    Chas1 Well-Known Member

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    LOADERS_LOFT, checked with my buddy this morning. Speer 1 in 8.
     
  7. Chief1942

    Chief1942 Well-Known Member

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    Sierra Edition 5 Fifth Printing

    #1742 .264 142 gr. HPBT MatchKing
    C.O.A.L. 2.765

    Accuracy Load Viht N150 37.9gr 2600 Velocity 2101 Ft. Lbs.

    Firearm Used - Savage 12 VSS
    Barrel Length 24"
    Twist 1 X 8"
    Case - remington
    Primer Remington 9 1/2
     
    Last edited: Nov 17, 2009
  8. 358sta

    358sta Well-Known Member

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    Hodgdon's site (no barrel data) 140 partitions & IMR7828 at 2755fps, 142 smk & H4831 at 2747fps

    Hodgdon's data for both bullet weights was obtained from a 1:9", 24" barrel.